Carbureter



'CARBURETEK APPLICATION FILED JULY 6,1914. RENEWED DEC. 8,19l9. 1,347,052, v PatentedJuly 20,1920.

2 SHEETS-SHEET l. l 95 96 64 v 2 ,a9 2e *#97 97 @e 63 '6J' n 77 30 56a 633 6 ,60 1,6% e /C30 8 f 71 7^? e 1L/,gg 4Z L l ILH M121 :f CH 67 e 2@ 96 L; i. 9 :if :I 55

87 j jgz Il 55 55 8f f I0 lu v I 5P LA x 3 5 5/ 6l 5 3P 14'/ 39 52 :sie ff f5 LII 3E \.",|l: :$5: 91 45 e .Z6 7 5J; 175 8 f A jw. 51 9;/ 0

l L 49 l 47 l 101,2 9 U witnesses" l fg .Z'nz/enzar' fm. 2h Miyagi.

UNITED STATES PATENT OFFICE.L

FREnEmcKA. os'r, or MINNEAPOLIS, MINNESOTA.

i l S CARBURETER.

To all whom t may concern Be it known that I, FREDERICK A. OST,

va citizen of the United States, residing at Minneapolis, in the. county of- Hennepin and State of Minnesota, have invented a new and useful Improvement in Garbureters, of

^ whichthe following is a specification.

My invention relates to .carbureters for internalcombustion engines, the principal a predetermined distance without admitting a proportionate volume of air.

A further object is to provide efficient,

vaporizing means whereby heavy oils are adapted to be carbureted and wherein heat' ing of the vaporizing surfaces is accom` plished, so that the oil can be vaporized when the engine. is being started.

Further objects of and advantages at-A tained by my invention will be apparent from the following description.

ln the accompanying drawings forming part of this specification, Figure lis a vertical sectional view through a carbureter embodying my invention; Fig. 2 is a horizontal section taken on the line X--X, Fig.

`1; Fig. 3 is a vertical section of a detail;

Fig. 4 isa horizontalsection. on theI line Y-Y, Fig. 3, and Fig. 5 is a vertical sec-` tion on the'line Z-Z, Fig. 4.

` y In fthe drawings, 2 indicates an inner casing, having a cylindrical body 3 formed with a conical upper end 4, a pair of lower laterally extending elbows 5 and 6 and an inner vertical gasifying tube 7, said tube being provided with a vertical central passage 8 in whicha longitudinally channeled valve lstem 9 is arranged. The lower por# tion of said casing is closed b a bottom plate 10, which is detachably secured to the casing by screws 11, a centrally disposed passage 12 being provided in said plate through which said tube 7 depends. The upper portion of the' casing 3 is surrounded by an outer casing 13,- which is spacedfa y short distance from the outer wall of the inner casing to form a vaporizing chamber 14, in which lair is drawn upwardly through openings 15, (see Fig.` 2), between the walls of the inner and vouter casings,

Specification of Letters Patent. Patented July 20` 192() Application filed` July 6, 1914, Serial No. 849,125. YRenewed,December 8, 1919. Serial No. 343,425.

The lower end of said outer casing is formed with a pair of ianges 16, which are seated .surrounding the tube 7forms a ,reverberatory chamber ini which unconsumed and burning gases exhausting ,from a combustion engine rebound, coupling elements 5 and 6 connected with the exhaust pipe of said combustion engine, (not illustrated), being provided forconducting said gases through said chamber. l The upper end of the outer casing is tapered inwardly to correspond with the inward inclination of the conical upper end of the rinner casing, and is formed with a neck'lS, which flares outwardly in an Vupward direction, and is formed with ,a horizontal valve seat 19, to receive the air valve 20. This valve is adapted to control the opening of the upper end of the vaporizing chamber and has a hub 21 that is slidably mounted on the upper portion of the stem 9. The periphery of the air valve is iianged upwardly and adapted to slide vertically in a cylindrical wall 22 extending upwardly above the valve seat 19, in the neck 18. The `valve 20- is also provided with a pair of bosses 23, (see Fig. 4), to which are pivotally attached the lower ends of a yoke 24, said yoke carry- .ing upon its neck freely rotatable antifriction rollers 25, part of Awhich actuate a lifter 61 to raise the valve 9, as will be hereinafter described. The cylindrical wall 22 is integral with an upper inclosing wall 26, whichforms a chamber through which the full lvapor arising from the- Vaporizing chamber 14, passes upwardly and through an outlet passage 27, which may be vconnected to the fuel manifold or combustion chamber of the engine not illustrated, said passage 27 being provided with the usual butterfly valve of suitable construction, such as 28, which is carried by a shaft 29 journaled in the wallsof the structure, and provided with an operating arm 30 or other suitable means by which the valve can be regulated to admit the desired quantity of fuel mixture into said combustion chamber or In'anifold.

' rllhe floor 10 is formed with upwardly eX- tending partition walls 31, which terminate a short distance from the upper end of the vaporizing chamber within the inner casingr and act as loaii'ieV plates against which the 'hotgases egressing from the exhaust of the engine impinge and aredeflected upwardly through the entire reverberatory chamber, so as to utilize a maximum amount of heat for raising .the temperature of the inner wall 3, and thus substantiallycomplete the vaporizing of the partly vaporized 'oil i quickly which spreads downwardly over the surface of the inner wall within thevapor izing chamber .14.

.Secured to the outer casing such as by the bolt 36, or other suitable means, is .an

oil supply-receptacle 3 5, said receptacle be ing provided in its lower end with an Aopening 37, having avalve seat 38, which is closed. by a valve 39 moving' upwardly. The valve 39 has a stem 40 extending upwardly inthe receptacle and guided by its upper end through a cover 41, and carrying a ioat 42, which regulates the height of the oil or hydrocarbon vfluid Ain the receptacle, which is maintained through the opening I and closing of valve39. A suitable supply sage being opened and closed by the needle valve 49, which is formed on the lower end of stem' 9. The lower end of the valve stemV which is Yformed with the needle valve 49 projects downwardly through a partition 56 across the passage8 into a chamber 51 in the Ylower end 'of said tube, said chamber being connected with a pre-heating'tubular coil 52, which conveys the fuel when the.

'valve 49 is opened to the passage 8 above said partition 50, said coil being looped upwardly overone of the baillewalls 31, so as to raise the. temperature of the fuel liquid in said coil quickly. The upper end of the conical portionof the inner casing is formed -withY an upwardly. and outwardly slanting surface 55, and the lower end of the hub 21' is formed with a -corresponding s lanting wall 56, said walls forming `an -upwardly and outwardly slanting passage, which is adaptedto spray the mixture of fuelliquid and gas received from the passage Sinto the space surrounded by the neck 1'8, from whence the liquid fuel descends upon Athe heated surface 4 of thev inner casing 'and the gas ascends. It will be noted that the diameter ofthe lower end of the valve stem-9 lis less than the diameter of the passage 8 and chamber 5'1, so'that there is free' 'connection' f with the ducts leading into or fromsaid passages. It will also be noted that theupper portion Y'of the valve stem passing through the opening 8V is formed with longhtudinal channels 57, which nearly coincide with the lower'edge of the wall 55, so that there is free communication between passage. 8 and chamberl 14. The conical surface 4 on the inner casing within the chamber 14 is formed with concentric circular ridges 58, forming grooves stepped, apart upwardly which serve to catch the fuel liquid received from pre-heating coil 52 and the passage 8 and, 'retain the same until it has been thoroughly gasitied and mixed 'with air. The action of the valve 2O is automatic through-thedrawing up of air and fuel mixture produced by the suction stroke of the engine, the distance the valve 20 opens being controlled by regulating an, auxiliary air ingress valve 80. The upper endof valve stem 9 has a head 60, said head and stem being raised by a lifter`6l -which has a cam surface 63 against which two of the antifriction rollers 25 press to tilt the lifter, said lifterbeing 'journaled between its ends upon a pivot bearing 62 on va support 67 carried by the linclosing wall 26.

One end of the lifter -is arranged below the head'60 and the other end having the 4cam surface 63 is placed in the path of move- I ment-of said rollers 25. A bellcrank lever' 64 is pivoted at its-angle upon the sha-ft 65 passing through a carriage 66, said rcarriage Abeing gibbed upon said arm 67,.whi ch is securedon the frame of the inclosing wall 26 by means of screwsV 68. One arm 6 4 of the bell crank lever 64 acts as an adjustable guide surface inclinng upwardly and inwardly, for the purpose of adjusting the amount of opening ofthe needle valve 49 on valve stem 9. A spring 69 between an extending arm 632 on the carriage 66`and one of the arms'6`33 o'f the bell crank lever serves to always hold the guide surface 'of the bell crank lever 'back against a regulating 'stop pin 70, said stop -pin being threaded in the inclosing wall 26 and passing freely through the carriage 66, so that` the amount of inclination of theguide surface on the bell crank lever may always be regulated in distance away from the cam surface 63 The position of `the carriage 66' is slidably held on the support 67 by a screw 7l, which has its outer endfthreaded into the carriage and its head seated inv the inclosing wall 26. 'A spring 72 on theshank of the screw 71 -is interposed. between thel inclosing wall 26 and the" carriage 66, whereby the carriage is urgedv forward the .full extent which the screw 71 permits.- It

2will be noted by regulating the screw 7 1,

the time at which .the yv alve 9 starts to open is regulated, and that the amountof inclination-of the .guiding surface ofthe bell crank lever 64,determines the length of interval lapsing between ,the time when the valve 49 starts to open and when it reaches wide open position.

i opens the valve 9.

For: the purpose of priming the device, the valve 9 may belopened by hand when starting, by depressing av pin 75, which is vvslidably mounted in the inclosing wall 26v4 and. passes freely through the'carriage. with 1ts inner end directed toward the free end of a lug 63":on'the cam surface 63 of the lever 61. This 'pin is held normally out of.

operation lby the spring 76 interposed between its head 77 and the outer'surface of the inclosing wall 26, whereby inward' depression' of saidIpin-tilts the lever 61 and The vapor chamber formed by the inclosing wall 26 is provided with an auxiliary air inlet valve 80, seated in its wall, which is held normally closed by the springs,82

v and 83, seated above a cap 84 on the outer lthat when turned. the compression ofthe spring 82 is regulated. The valve 80 remains closed during the working stroke of the'piston of the engine, but opens auto-V matically during the suction stroke to admit apredete'rmined amount of air, which mixes with the fuel entering the engine according to 'the force urged'against the valve by the springs 82 v and 83.

Situated above the-adjusting mechanism inthe chamber formed by thecasing 26 is l a relief valve 95 seated in the casing Iwall and' held closed by a restraining spring 96 below a valve cage 97, which is threaded into engagement with said wall. In case of back firing due to premature explosion in the chamber formed by said casing 26, the

relief valve isopened automatically and releases the pressure 'of burning gases.

The gasifying tube\,7 may be preheated to assist in vaporizing 'the fuel by means independent of the exhaust gases from the engine passing 'through' the reverberatory chamber. This means maybe in theform of an electric coil such as 90 mounted upon the gasifying tube 7 andembedded in insulation such as asbestos, enamel or other-suitable material 91. The ends of this coil forming electric conductors may be connected with av suitable source of electric power not illustrated, for 'the purpose of energizingthe coil and heating the gasifying tube, so that when starting the engine with kerosene or other heavy or light oils or alcohol, the fuel liquid is raised to a gasifying temperature, so asto readily mix with the air passing into the carbureter. As

illustrated one end of the circuit is shown' grounded upon the metal frame work of the structure, whilel the other end is led outwardly through an insulating bushing 92, in the bottom plate l0.A It will be noted that the'bottom plate 10, pre-heating tube be removed from the apparatus for cleaning, repairing or replacing vpartos Vwhen desired. J'

yshown whereby the roller 25 maybe swung back clear of the stem andthe stem lifted out through the valve passage 95 above the stem. After cleaning the stein it may easily be replaced. l A

To release abnormal pressure inthe carfbureter due to back firing, a valve 96 is seated in the passage 95 and held byv the V.spring normally closed, said spring being seated below the valve cage 97. To remove the valve 96, the cage 97fis removed.

,52, and the electric pre-heating coil90 may y In accordance with thepatent statutes, I

have described theprinciples of operation of my. invention, together with the appa ratus which I now consider to represent the .best embodiment thereof, but I desire to have it understood that the construction shown. is oi'ily illustrative, and that the invention can be carried out by other means and applied to uses other than those above set forth within the scope of the following claims.

-What is claimed lis:-

1. A carbureter, comprisin g, in combination, in'closing walls lforming inner reversion of air land the egress of fuel mixture, ,saidu inner chamber being formed with a long fuel gasifying tube depending downwa'rdlytherein having its lower end adapted tobe connectedwith a source of fuel supply and itsupper end connected with lsaidouter chamber, a valve seatedA in said tube and adapted to close the passage in its lower end Y and having a long stem extending upwardly l1,15

through said passage and provided with a channel in its side whereby residue in the passage of -said tubefrom the 'passage of fuel mixture therethrough is collected, said valve being removably mounted in said tube," whereby said channel can be cleaned and Ameans for opening and closing said valve.

2. A carbureter, comprising, in combination, inclosing walls forming inner reverberatory and outer gasifying chambers, said inner chamber being formed with an inlet and an outlet for the circulation of exhaust Vgases through said inner chamber and said fuel mixture, said inner chamber -being formed with a fuel gasifyingtube depending downwardly therein having its lower end adapted to be connected with a source of fuel supply and its upper end connected with said outer chamber, a preheating coil interposed between the lower and upper portions of said passage in said tube, said coil being arranged in said reverberatory -inner chamber being formedwith an inlet and an outlet for the circulation of exhaust gases through said inner chamber and said outer chamber having an inlet and an-outlet for the admission of air and the egress of fuel mixture, said inner chamber having a fuel' gasifying tube depending downwardly therein, the lower end of said tube being adapted to be connected to a source of fuel supply and its upper end communicating .with said outer chamber, a valve seated in said tube and adapted to control the opening and closing of said passage, a preheating .tubular coil interposed between the lowerv and upper portions of said passage in said tube and removably connected by its ends to said tube, an electrical heater removably associated with said gasifying tube for heating it anda bottom plate removably mounted upon the lower portion of the wall of` said inner chamber whereby access can be gained tosaid innerchamber'for the re movalof said coil an'dheater.

4. A carbureter, comprising, in 'combination, inclosing walls forming inner` reverberatory and outer gasifying chambers, said inner chamber being formed with an'inlet and an outlet for the circulation of exhaust gases through said inner chamber and said outer chamber havingan inletand an outlet for the admission of -air and the egress of.

` fuel mixture, said walls also forming a secand secondary chambers, a fuel supply valve ondary chamberabove said outer chamber, said inner chamber having a fuel gasifying tube depending downwardly therein and having its lower end adapted to be connected to a source of fuel supply and its upper end connectedwith said outer chamber, a gas controlling valve seated between'said outer seated in said tube and adapted to control the opening and closing of its passage and having a stem projecting upwardly and freely through said gas controlling valve,-

said stem-being formed with a shoulder on its upper end and said gas controlling valve being provided with a push .element4 extendi ing upwardly, whereby as said stem is raised said gas controlling valve is moved into open position, a lifting element movably mounted with an arm below said shoulder I to raise said stem, said lifting element being provided with a cam surface against which the upper end of said push element is adapted to press to cause the moving' of said stem through the raising movement of said -gas controlling valve and means for regulating the movement of-,the upper end of said push element to varythe amount of opening of gases through said inner chamber and said.

outer chamber having an inlet and an'outlet -fo'f'r the admission of air Vand the egress of fuelmixture, said walls also forming a secondary chamber above said outer chamber, said'inn'er chamber having a -fuel gasifying tube depending downwardly therein and having its lower end adapted to be connected to a source of fuel supply and its upper end connected with said outer chamber, a gas controlling valve seated between said outei and-secondary chambers, a fuel supply valve seated in said tube and adapted to control the opening and closing of its passage and having a stein projecting upwardly and freely through said gas controlling valve, said stembeing formed with a shoulder on its upper end and said gas controlling valve being providedwith a push element extending upwardly, whereby as said stem is raised said gas controlling valve is moved into open position, a lifting element movably mounted with'r an arm below said shoulder to raise said stem, said lifting element being provided with a cam surface against which the upperend of said push element is adapted to press to cause the moving of said stem fuel supply valve, and vmeans for adjusting said regulating means to cause the latter to vary the time of the 'opening of said fuel valve with relation tosaid gas controlling valve. l v

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

' FREDERICK A. OST.

Witnesses:

` STELLA L. WASCHENBERGER,

lF. G. BRADBURY. 

